will this also work on physical server or this is just defined for a cloud migration?

[Ola Peters]

This question is in reference to Atlassian Documentation: Changing the Cloud Instance URL Address or Migrating to a New Cloud Instance

Ask your question here...

[Nic Brough -Adaptavist- · Accepted solution]

Sort of - the process for both is "get the data out, set up a new system on the new server, then get it into the new server".

But https://confluence.atlassian.com/jira/migrating-jira-to-another-server-151126305.html is a better guide to the Server side because it talks about all the things that you need to think about (Cloud handles a lot of that for you, but relies on export/import.  Server needs you to do more, but the data can be a lot easier to move)

[NotTheRealStephenSifersNOPENOPENOPENOPE]

The article you have listed is cloud only.

To change the URL of your server instance, you need this article:

https://confluence.atlassian.com/doc/configuring-the-server-base-url-148592.html